Parser program

It acts in reverse by tracing out the rightmost derivation of a string until the parse tree is constructed up to the start symbol This type of parsing is also known as shift-reduce parsing. One example is an LR parser. By: Brad Rudisail Contributor. By: Kaushik Pal Contributor. By: Leah Zitter Contributor.

Dictionary Dictionary Term of the Day. Decentralized Finance. Techopedia Terms. Connect with us. Sign up. Term of the Day. Best of Techopedia weekly. News and Special Offers occasional. Techopedia Explains Parser. What Does Parser Mean? Techopedia Explains Parser In order for the code written in human-readable form to be understood by a machine, it must be converted into machine language.

The overall process of parsing involves three stages: Lexical Analysis: A lexical analyzer is used to produce tokens from a stream of input string characters, which are broken into small components to form meaningful expressions.

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Compiler Design. Computer Organization. Discrete Mathematics. Bottom-Up Parsers: In this Parsing technique we reduce the whole program to start symbol. A top-down parser builds the parse tree from the top to down, starting with the start non-terminal.

By carefully writing a grammar means eliminating left recursion and left factoring from it, the resulting grammar will be a grammar that can be parsed by a recursive descent parser. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide.